# STC SH1007SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Texas Helicopter Co. Inc, United States
- Description: Modify tail rotor pitch change mechanism to add duplex bearing, (P/N 47-641-131-1) in place of single row bearing.  Approved for Bell models 47D1, 47G, and 47G-2 with 47-640-044 tail rotor gear box assembly.
- Applied: March 5, 1969
- Status date: December 15, 2010
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H-1](https://openairdocs.org/tcds/H-1)
- Certificate PDF: https://openairdocs.org/files/sha256/21/fb/21fb27192de2cc62a5afc7c1d0ae9182d73bfbc3d69cf81bee363d8d3fbdd3ba
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/91C4EAE22442C0FA862579CE00531BCF.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH1007SW

## ADs that name it (0)

None.

## Approved models (3)

- Scotts-Bell 47 Inc 47D1 ([TCDS H-1](https://openairdocs.org/tcds/H-1))
- Scotts-Bell 47 Inc 47G ([TCDS H-1](https://openairdocs.org/tcds/H-1))
- Scotts-Bell 47 Inc 47G-2 ([TCDS H-1](https://openairdocs.org/tcds/H-1))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

Number SH1007SW This certificate issued to

Part 6 of the Civil Air Regulations.

Modify tail rotor pitch change mechanism to add duplex bearing (P/N 47-641-131-1) in place of single row bearing in accordance with K Copter Duplex Bearing Installation K-007 dated March 7, 1969.

This modification approved for Bell Models 47D1, 47G and 47G-2 with 47-640-044 tail rotor gear box assembly.

The installer must determine whether this design change is compatible with previously approved modifications. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission.

Texas Helicopter Co., Inc.

780 S. Elmwood Ave.

Le Sueur, MN 56058 H-1 Make : Bell Helicopter Textron Model : 47D1, 47G, 47G-2 Date of application : March 05, 1969

Date of issuance : March 14, 1969

Date reissued : 3/4/86; 7/27/87; 4/30/04;

12/15/10

Date amended : 11/22/74 Rev. 1

( Signature) Scott A. Horn, Acting Manager Rotorcraft Certification Office, Southwest Region

( Title)

FAA Form 8110-2-1(10-69) Page 2 of 2

## Every issue (1)

- December 15, 2010: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/21/fb/21fb27192de2cc62a5afc7c1d0ae9182d73bfbc3d69cf81bee363d8d3fbdd3ba)

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